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post #971 of 3922
Quote:
Originally Posted by spinejam View Post

tx for all your help garikfox. I'm running a 128k stripe -- if I want to switch to 32k stripe, would I need to reinstall windows? not sure I want to go through all the trouble if I do. wink.gif

You need to destroy your RAID array and then recreate it with a different strip size. That would delete all your data. If you do an image backup of your C and then restore it on the new RAID array, it should work.

NOTE: With the app "TreeSize professional", I looked at my C:\ to get the average file size:

C:\Program Files (x86) = 244.9 KB
C:\Windows = 248.1 KB
C:\Program Files = 381.8 KB
C:\games = 479.9 KB
C:\Users = 673.8 KB

Total average file size: 405.7 KB


The point is, with a 32 KB stripe, the granularity is excessive for a Windows 7 *DESKTOP* environment as you need to combine 2 stripes (1 from each drive) to get the smallest block size, which in this example is 64 KB (2 X 32 KB). In essence, a small strip add overhead to reconstruct files with too many small block size. The point of using a 32 KB strip would be to accelerate files of size down to 64K. File smaller than 64K in a 32 KB strip array would be stored on 1 drive up to 32KB and the rest on the second drive + empty space to fill the 64 block size, On the other hand, much bigger files would be stripped to death in a lot of (too many) small 32 KB stripes, reducing speed because of the reconstruction overhead.

Example:

A 48 KB file would be saved as 1 X 32 KB part on drive 1 and 1 X 16KB part on drive 2 + 16 KB of empty space = 1 X 64 KB block size. That would only partially accelerate loading this file as not 100% of the file is split across 2 drives.

A 6144 KB file would be saved as 96 X 32 KB part on drive 1 and 96 X 32 KB part on drive 2 = 96 X 64 KB block size. That would accelerate the loading of this file BUT you'll need to join back 192 stripes to reconstruct the file. With a 128 KB stripe, the same file would be stored as only 24 part X 128 KB on each drive, requiring only 48 stripes to be join back to reconstruct the file. That's 4 times less overhead!


16KB, 32KB and even 64KB strip validity is more obvious in older OS using smaller file size (all files were generally smaller in Windows 95, 98 and XP compared to Vista, 7 and 8) and for server /database profile involving tons of very small files . As you can see, my C:\ drive has an overall average file size of 405.7 KB, which mean the vast majority of the files are over 256 KB, which is the perfect target file size of a 128KB stripe array.
post #972 of 3922
Thanks for the info guys -- much appreciated! thumb.gif
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post #973 of 3922
Hi,

I'm looking into updating my expansion firmware for each device I have on my P8Z68 Deluxe bios 3606. I extracted the Marvel 1B4B-9130 device rom and disassembled it. Its device id is for a 1B4B-9128. I also got a hold of a newer version from Win-Lite.de and that one's device id says 9123. This is kind of weird in that I guess the stated firmware device id doesn't matter? Is the one from Win-lite version 100.1033 safe?

Thanks
post #974 of 3922
Thread Starter 
davidm71: I wouldnt mess with 3rd Party SATA controllers firmware, Sometimes when you update the module it doesnt work because the Chip itself needs to be flashed to be updated.
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post #975 of 3922
Thread Starter 
Ramon: Intel Recommends a 32k stripe for SSD's, Prior to the 11.x.x.x OROM they Recommended a 16k stripe size.
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post #976 of 3922
Quote:
Originally Posted by garikfox View Post

Ramon: Intel Recommends a 32k stripe for SSD's, Prior to the 11.x.x.x OROM they Recommended a 16k stripe size.

What is the adviced size for a 3 drives Raid 5, with latest OROM, used as System Drive together with an SSD?
post #977 of 3922
Thread Starter 
If there SSD's 32k wink.gif
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post #978 of 3922
Quote:
Originally Posted by garikfox View Post

davidm71: I wouldnt mess with 3rd Party SATA controllers firmware, Sometimes when you update the module it doesnt work because the Chip itself needs to be flashed to be updated.

Too late.. I went ahead and updated like half dozen rom modules on my P8Z68-Deluxe 3603 (Gen1) bios.

Here are the changes:

Realtek Network Device: 10EC-8168 from ver 2.38 to ver 2.52
Jmicron Sata Device: 197B_2362 from ver 1.07.23 to 1.07.28
Marvel Sata Device: 1B4B-9130 from ver 1.0.0.1031 to ver 1.0.0.1033
Intel HD2000 Device: 8086-102 from ver 2124 to ver 2143
Intel GB Network Device: 8086-1503 from ver 1.3.72 to ver 1.3.95
intel Raid Controller Set to: 11.6.0.1702 (Trim enabled)

Also includes Apple Powermanagement fix for booting OSX...

So far had a successful flash and booted into windows just fine. My Marvel raid array still is working fine. Network controller of course is working fine (only tested one but both show up on device manager). If anyone has a Z68 Deluxe feel free to try it out. Advise caution using it though. If only we could add Virtu MVP license in there it would be awesome...

Thanks.

PS: Special thanks to Astrotweak's work as his board was similar enough to take that leap.
Edited by davidm71 - 12/16/12 at 11:18am
post #979 of 3922
Quote:
Originally Posted by garikfox View Post

Ramon: Intel Recommends a 32k stripe for SSD's, Prior to the 11.x.x.x OROM they Recommended a 16k stripe size.

Is that so? Hard to contradict Intel themselves, I'm sure sure they have some hard data to back this up. Just curious, did you ever made the test yourselves? I would be curious to know the difference in benchmark from 32 KB to 128KB stripe. Maybe SSD are different than HDD in that respect. I did test stripe size back in the days with my WD raptor 36GB 10K RPM RAID 0 setup and found the best balance was around the average file size. In enterprise grade RAID controller, stripe size range is much wider. You can choose from 8 KB all the way up to 1024 KB depending on the work load!

By any chance, do you have the link source for Intel 32 KB stripe size recommendation? I would like to read to whole white paper if available.

Thanks!
post #980 of 3922
Quote:
Originally Posted by davidm71 View Post

Too late.. I went ahead and updated like half dozen rom modules on my P8Z68-Deluxe 3603 (Gen1)

Wow, I think I would pay money to get all the latest firmware on my board. This is amazing! If you happen to lay your hand on an Asrock Extrme4 GEN3 BIOS one day and feel the moding rage calling... please let me know! LOL!
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